cli/show: emit new whole-message crypto status output

This allows MUAs that don't want to think about per-mime-part
cryptographic status to have a simple high-level overview of the
message's cryptographic state.

Sensibly structured encrypted and/or signed messages will work fine
with this.  The only requirement for the simplest encryption + signing
is that the message have all of its encryption and signing protection
(the "cryptographic envelope") in a contiguous set of MIME layers at
the very outside of the message itself.

This is because messages with some subparts signed or encrypted, but
with other subparts with no cryptographic protection is very difficult
to reason about, and even harder for the user to make sense of or work
with.

For further characterization of the Cryptographic Envelope and some of
the usability tradeoffs, see here:

   https://dkg.fifthhorseman.net/blog/e-mail-cryptography.html#cryptographic-envelope

1 files changed, 15 insertions, 4 deletions

diff --git a/test/T350-crypto.sh b/test/T350-crypto.sh
index 3539bafe..0aada4df 100755
--- a/test/T350-crypto.sh
+++ b/test/T350-crypto.sh
@@ -25,7 +25,7 @@ test_expect_equal "$output" "thread:XXX   2000-01-01 [1/1] Notmuch Test Suite; t
 test_begin_subtest "signature verification"
 output=$(notmuch show --format=json --verify subject:"test signed message 001" \
     | notmuch_json_show_sanitize \
-    | sed -e 's|"created": [1234567890]*|"created": 946728000|')
+    | sed -e 's|"created": [1234567890]*|"created": 946728000|g')
 expected='[[[{"id": "XXXXX",
  "match": true,
  "excluded": false,
@@ -33,6 +33,7 @@ expected='[[[{"id": "XXXXX",
  "timestamp": 946728000,
  "date_relative": "2000-01-01",
  "tags": ["inbox","signed"],
+ "crypto": {"signed": {"status": [{ "status": "good", "created": 946728000, "fingerprint": "'$FINGERPRINT'", "userid": "'"$SELF_USERID"'"}]}},
  "headers": {"Subject": "test signed message 001",
  "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
  "To": "test_suite@notmuchmail.org",
@@ -74,6 +75,7 @@ expected='[[[{"id": "XXXXX",
  "timestamp": 946728000,
  "date_relative": "2000-01-01",
  "tags": ["inbox","signed"],
+ "crypto": {"signed": {"status": [{ "status": "bad", "keyid": "'$(echo $FINGERPRINT | cut -c 25-)'"}]}},
  "headers": {"Subject": "bad signed message 001",
  "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
  "To": "test_suite@notmuchmail.org",
@@ -112,6 +114,7 @@ output=$(notmuch show --format=json --verify subject:"bad signed message 002" \
     | notmuch_json_show_sanitize \
     | sed -e 's|"created": [1234567890]*|"created": 946728000|')
 expected='[[[{"id": "XXXXX",
+ "crypto": {},
  "match": true,
  "excluded": false,
  "filename": ["YYYYY"],
@@ -143,7 +146,7 @@ gpg --quiet --batch --no-tty --export-ownertrust > "$GNUPGHOME/ownertrust.bak"
 echo "${FINGERPRINT}:3:" | gpg --quiet --batch --no-tty --import-ownertrust
 output=$(notmuch show --format=json --verify subject:"test signed message 001" \
     | notmuch_json_show_sanitize \
-    | sed -e 's|"created": [1234567890]*|"created": 946728000|')
+    | sed -e 's|"created": [1234567890]*|"created": 946728000|g')
 expected='[[[{"id": "XXXXX",
  "match": true,
  "excluded": false,
@@ -151,6 +154,7 @@ expected='[[[{"id": "XXXXX",
  "timestamp": 946728000,
  "date_relative": "2000-01-01",
  "tags": ["inbox","signed"],
+ "crypto": {"signed": {"status": [{ "status": "good", "created": 946728000, "fingerprint": "'$FINGERPRINT'"}]}},
  "headers": {"Subject": "test signed message 001",
  "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
  "To": "test_suite@notmuchmail.org",
@@ -177,7 +181,7 @@ test_begin_subtest "signature verification with signer key unavailable"
 mv "${GNUPGHOME}"{,.bak}
 output=$(notmuch show --format=json --verify subject:"test signed message 001" \
     | notmuch_json_show_sanitize \
-    | sed -e 's|"created": [1234567890]*|"created": 946728000|')
+    | sed -e 's|"created": [1234567890]*|"created": 946728000|g')
 expected='[[[{"id": "XXXXX",
  "match": true,
  "excluded": false,
@@ -185,6 +189,7 @@ expected='[[[{"id": "XXXXX",
  "timestamp": 946728000,
  "date_relative": "2000-01-01",
  "tags": ["inbox","signed"],
+ "crypto": {"signed": {"status": [{"errors": {"key-missing": true}, "keyid": "'$(echo $FINGERPRINT | cut -c 25-)'", "status": "error"}]}},
  "headers": {"Subject": "test signed message 001",
  "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
  "To": "test_suite@notmuchmail.org",
@@ -264,6 +269,7 @@ expected='[[[{"id": "XXXXX",
  "timestamp": 946728000,
  "date_relative": "2000-01-01",
  "tags": ["encrypted","inbox"],
+ "crypto": {"decrypted": {"status": "full"}},
  "headers": {"Subject": "test encrypted message 001",
  "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
  "To": "test_suite@notmuchmail.org",
@@ -315,6 +321,7 @@ output=$(notmuch show --format=json --decrypt=true subject:"test encrypted messa
     | notmuch_json_show_sanitize \
     | sed -e 's|"created": [1234567890]*|"created": 946728000|')
 expected='[[[{"id": "XXXXX",
+ "crypto": {},
  "match": true,
  "excluded": false,
  "filename": ["YYYYY"],
@@ -350,7 +357,7 @@ test_expect_success \
 test_begin_subtest "decryption + signature verification"
 output=$(notmuch show --format=json --decrypt=true subject:"test encrypted message 002" \
     | notmuch_json_show_sanitize \
-    | sed -e 's|"created": [1234567890]*|"created": 946728000|')
+    | sed -e 's|"created": [1234567890]*|"created": 946728000|g')
 expected='[[[{"id": "XXXXX",
  "match": true,
  "excluded": false,
@@ -358,6 +365,9 @@ expected='[[[{"id": "XXXXX",
  "timestamp": 946728000,
  "date_relative": "2000-01-01",
  "tags": ["encrypted","inbox"],
+ "crypto": {"signed": {"status": [{ "status": "good", "created": 946728000, "fingerprint": "'$FINGERPRINT'", "userid": "'"$SELF_USERID"'"}],
+                       "encrypted": true },
+            "decrypted": {"status": "full"}},
  "headers": {"Subject": "test encrypted message 002",
  "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
  "To": "test_suite@notmuchmail.org",
@@ -433,6 +443,7 @@ expected='[[[{"id": "XXXXX",
  "timestamp": 946728000,
  "date_relative": "2000-01-01",
  "tags": ["inbox","signed"],
+ "crypto": {"signed": {"status": [{"errors": {"key-revoked": true}, "keyid": "'$(echo $FINGERPRINT | cut -c 25-)'", "status": "error"}]}},
  "headers": {"Subject": "test signed message 001",
  "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
  "To": "test_suite@notmuchmail.org",